Stapler



FIG. 1 is a front end view of the stapler

FIG. 2 is a rear end view of the stapler

FIG. 3 is a left side view of the stapler

FIG. 4 is a right side view of the stapler

FIG. 5 is a top plan view of the stapler

FIG. 6 is a bottom plan view of the stapler; and,

FIG. 7 is a perspective view of the stapler.

Portions of the stapler shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a stapler, as shown and described. 